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The Journal of Heredity 1997:88(6):549-553
© 1997 The American Genetic Association 88:549-553

other

Hairy-sheath-frayed 1–O is a Non-Cell-Autonomous Mutation That Regulates Developmental Stage Transitions in Maize

J. Saberman, and R. Bertrand-Garcia

Department of Biology, Colorado College Colorado Springs, CO 80903
J. Saberman is now at the Mayo Medical School, Mayo Clinic Rochester, Minnesota

Corresponding Editor: Halina Skorupska

Abstract

Hairy-sheath-frayed 1–O (Hsf 1–O) is an ethyl methanesulfonate-induced, semidominant mutation that retards developmental-stage transitions in maize, causing the acropetal extension of juvenile characteristics and prolonged development of several tissues and organs. We induced chromosome breakage using X-rays to create plants genetically mosaic for Hsf1–O. Sectors were marked for the loss of Hsf1–O with the linked recessive chlorophyll-deficient mutation, lemon white-2 (lw2). White sectors on green leaves were hemizygous (with the genetic makeup—hsf1+lw2). Examination of genetically wildtype sectors showed that Hsf1–O codes for or regulates a non-cell-autonomous gene product that diffuses over short distances in the plant. The non-cell-autonomous nature of Hsf1–O is unusual because of its limited diffusion pattern which may reflect a unique function that regulates stage transitions in maize.


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